Power chain



Oct. 2 1923. 1,469,391 F. L MORSE POWER CHAIN Filed May 15, 1922 w h) *ww/ub..

In toz v @Mime/41 Patented Oct. Z, 1923.

FRANK LfMoRsnor ITHACA,`NEW YORK, AssrGNon To MORSE CHAIN COMPANY, A

PATENT OFFICE.-

CORIORATION 0F NEW YORK.

POWER CHAIN.

Application filed May 16, 1922. Serial No. 561,298.

of New. York l have inventedk a certain new` and useful lniprovenientin Power Chains, of which improvement the following,Y is a specification.

This invention relates to power chains..

and more particularly .to that class in which the links are made up of'a pluralitv of plates adapted to arch over the sprocket teeth, and joined by pintles formed in two parts, a seat pin and rocker pin, such as shown, 'for in-V stance, in my prior Patent No. 799,073, of September 12, 1905'.

.According tothis .prior construction, the.

seat pin is secured within the openings at lone end of the link plates,- while theroeker pin is secured in the openings of the platte of the adjoining link, both pintle parts extendinef throuoli the openings in the adjoin.

ing; links', and bearingr upon each other throughout the full lwidth of Athe chain, the curved or rocking surface of the rocker pin engaging the flat surface of the seat pin with a rolling Contact when the joint bends. The pintle .parts are also provided with broad flat bearing surfaces which engage each other when the chain is pulled straight, as in the portion between the sgrocket wheels.

It is also proposed, in said prior construction, that the broad bearing surface between the pintle parts may be curved instead of flat, and for this purpose the seat pi-n is shown as provided with a concave depression, while a projecting rib havinga corresponding convex surface is toi-ined on the rocker pin, and is adapted. to engage with the concave depression in the seat pin throughout the straight portion of the chain.

With this construction, however, when the joint bends, the rounded edge of the rocker pin engages the surface of the seat pin so near the edge of the depression that there is a tendency for the seat to crush or crack off at this edge, which is objectionable; and. the main object of in?,7 present inii'ention is to overcome this difficulty' and strengthen the seat pin so that the parts may engage each other by a broad curved bearing; surface having sliding friction, in the straightV upon the sprocket wheel, and without injury to the surface of the seat pin. i

` This object isV obtained by forming the projecting rib with the convex frictional bearin vtace upon the seat pin and providing the rocker pin with a concave depression for engaging therewith when the chain is pulled straight. By this means the seat pin is strengthened, and thel weak point in the bearing' surface is eliminated. l

In theaccompanying drawing, Figure 1 is a sideelevation showingseveral links of a j chain einbodyino my improvement, two of the links engaifgiiigv a .sprocket wheel, and the pintle parts of the three joints being indicated in transverse section; and Fig; 2, a

plan of the several links of the chain.

AccordingA to the construction shown., the chain is inade up of links composed of a pluralityv of plates, 3, adapted to arch over the sprocket teeth, 4, the plates of adjoining links being connected by two-part pintles,

ctnnprisingy seat pin, 5, and rocker pin, 6, extending` throi'ig'h the openings in the overlapping1 link plates. The seat pins are secureifl in the openings at one end of the plates of each link, while the rocker pins are fastened in the openings in the plates ot the adj oining links and bear upon the seat 1nins throughout the full width of the chain. The rounded surface of the rocker pin is adapted. to roll upon the fiat bearing surface or" the seat pin as the joint bends upon the sprocket wheel, and according to my present iinproven'ient, the seat pin, 5, is provided with a projection or rib, 7, having a convex surface adapted to engage the'concaif-e surface of the depression. 8. formed in the rocker pin, 6, when the chain is pulled straight, as in the portion between the sprocket wheels.

The joint at the left in the craving shows the rounded surface of the rocker pin bearing upon the flat surface of the seat pin, as in that portion of the chain which oent upon the sprocket wheel, while the other joints show the parte turned to the straight position in which the broad convex bearing surface of the rib, 7, engages the depression, 8, with sliding` friction. ln the straight portion of the chain, there is sulicient elearance between the other parts of the pintles yto permit a slight oscillating movement of resistance in this portion of the chain, andV Y are riveted upon the outside ends of the seat pins, 5, Vfor holding the linksrof the Y chain together.

Having now described my invention, what I claim as new and desire to secure by Letters. Patent is:

l. In a rocker-joint chain, a two-part pintle comprising a seat pin having a flat bearing face and a projecting rib formed With a curved bearing surface, anda rockerA pin having a rounded surface forv rolling upon the fiat face of the seat pin and a depression :for engaging said projectingrib when the chain lis pulled straigh 2. In a rocker-joint chain, a two-part pintle comprising a seat pin havinga longitudinal rib provided with a sliding frictional surface, and a rocker pin having rounded surface for rolling upon the seat pin when the joint bends and a longitudinal depression having a corresponding sliding frictional surface for engaging the rib when the chain is pulled straight.

3. In a rocker-joint chain, a'tWo part pintle comprising a seat pin, having a flat hearing face and a longitudinally projecting rib formed With a convex bearing surface, and a. rocker pin having a, rounded'surface for engagingthe flat face of the seat pin with rolling contact when the joint` bends, 40

and a longitudinal'concave Ydepression for engaging said rib with Sliding frictional resistance when the `chain is pulled straight.

4. In a rocker-joint-chain, the combination withlinks composed of a plurality of pin having a flat bearing face and a projecting ribV formed With a convex surface, Y and the rocker pin having a` roundedsnrface :for rolling Von the seatjpin when the joints bend,yand a concave depression vfor engaging said rib with sliding friction when the chain-is pulled straight.

5. In a rockerjoint chain, the combination with links composed of `a plurality of plates. or". two-part pintles comprising a seat pin and a rocker pin, the seat pin hav- 09 ing a longitudinal rib With a convex bear' ing surface, and the rocker pin having a lon# gitudinal concave depression for engaging said rib when the chain is pulled straight,-

and Washers riveted upon the outside ends of the seat pin.

In testimony whereof I have hereunto set ,my hand.

Y .FRANK L. Monsn 

